It's a great feeling to have accomplished what I have, but I want to do more.

To stay interested in tennis, I have to mix it up with other things.

I believe I live in a black and white. I think things are like either black or white. I don't really believe that much in the gray. I think that there's gray for a lot of people, but I don't live in the gray. I realize whatever action I have or take, it's going to have a consequence -- either good or bad. So I live my life in a way where I don't have bad consequences. I just notice there's a lot people around me just live in the gray. I don't know, for me, I'm just really straightforward.

A lot of people say, "Oh, I get this high from working out." I've never felt that, maybe because I've worked out for so long it's just a norm for me to push super, super hard. I don't feel the euphoria. But at the end, when it's all done, I feel euphoric. I'm like, "Yes, the work is done." You just feel like a glowing feeling inside.

You learn so much from your parents. We grew up in a home where we were definitely taught to be confident. I definitely give me parents a lot of credit.

Since I started playing at the Olympics in 2000, I have always wanted to do a dress based on Wonder Woman. It should be interesting to wear. And hopefully, it will get me a gold medal.

The most fun part about working out is being done - getting through the workout, let's be honest. But that feeling afterward? Yeah, that's worth it.